Electrical extension-bracket



J. BTGILBS.- ELECTRICAL EXTENSION BRACKET.A

(No Model.)

Patented eb. 12 1884i.`

x lllllllllllllllfllllllllllllllllllllllll llllll III'fIIlll-IAIIIIllllllllllllllll WITNESSES UNITED STATES PATENT GEEICE.

. Y '.I. EDWIN GILEs, 0E IIAZIETON, PENNSYLVANIA.

. ELECTRICAL EXTENSlON-BRACKET.

SPECIFICATIONforming part of Letters Patent No. 293,318, dated February 12 1884-..

Application tiled September S, 1883. (No model.)

To all whom t mag/.concern Be it known that I, J. EDwINGILEs, of Ha zleton, in the county of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in Electrical` Extension- Brackets; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others Skilled in the art to which it appertains to make and use the same, reference beingnhad to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specication. i

i Myimprovelnent relates toelectric-lamp fixtures for lighting from a side wall or from a ceiling. l

The obj ect of my invention isto simplify the construction of fixtures, to lessen the cost of iirst construction, and to render the'electrical communication such that it may not require an expert to make the connections between the main conductor and lamp orrepair parts accidentally damaged.

In my improvement in side-wall iixtures I use a pivoted or` jointed bracket, either fastened to the wall or screwed to an existing gaspipe in the same manner that gas-brackets are now attached, permitting, if required, the

' electrical conductorsto be brought through 4o `joint or swivel is an extension-arm or lampsupport. In my improved extension-bracket arm I use 4an inner and' outer tube, and although the positions of these tubes can be reversed without detriment to my improvement, I prefer, because of increased strength, to use the outer or largest tube in connection with the swivel. In some cases I use but one tube, re-

placing the inner tube bya bar of any suitable non-conducting material-such as wood, vulcanite, or other substance-to be of .the same shape as the outertube, with an unbroken surface, and to be stiffened by inserting metal tubes, that shall also' serve as current-conductors. an inner-I insert within theinner tube two small tubes, to serve as current-conduhtors and to guide metal rods that are constantly in rubbing electrical contact, thus dispensing with contact-strips, springs, Src. t rIhese small tubes are placed within the inner tube, and a semiliquid insulating material-such as asphalt or a co mp ound thereof in a heated state-is poured in, thus insulating the small tubes from each other and from the containing-tube.

My improved lamp-switch for completing the circuit with the lamp consists of a thumbkey at the bottom or finger-lever at the side,

or both, of the switch-box or lamp-holder, de-` Where two tubes are usedan outer andsists of the iinger-levcr operating against one or between two metal pieces, preferably strips slightly bent, so as to keep the leverin out of contact with a Inetal pin or plate. The metal springs and pin are respectively connected with a conductor and lamp.

My improvement in vertical extension-tixtures is, in all important features, essentially -the same as myA improved wall extensionbracket, excepting that in' the hanging-lamp fixture, to overcome the weight of the lower tube or bar, lamp, Src., Iprovide a packingboX filled with any suitable material, thus producing sufficient friction to sustain the weight ot' the tube or bar, lamp, Src. This vertical extension-fixture can be screwed to an existing gas-pipe or attached to the ceiling, or it can be a part of and carrying a lamp or lamps of a chandelier. I do not confine myself to two internal conductors in extension -iixtures, as where the tubes or metals forming the extension device constitute one conductor, then but one internal conductor willbe necessary.

My invention further consists ot1 certain other features of construction, all as hereinafter described and claimed.

`Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is aside view, in section, of a comroo l plete' wall extension-bracket, with swiveljoint and lamp-switch. Fig. 2 is an enlarged plan of the lampswiteh. Fig. 3 is a ceiling or drop extension-iixture in section. Fig. 4 is an enlarged section of bar c and tube f.

A is a base or lower part of a swiveling device, provided with means for securing to a gas pipe or fixture, or attaching to the wall.

A is lthe upper part of the swiveling device, fitting over A, and forming a movable joint. A and A are secured together by a nut, b, or a screw, b, working in a groove in A.

Through the projecting swivel of A, and insulated therefrom, passes a tube, b2, through which and insulated therefrom passes a metal pin, b3. To complete the insulation, washers bX-top and bottom-are used. The pin and tube are held in position by friction or other means. cConductors b" b are hooked on the tube b2, and b5 b5 are hooked on the pin b3. The conductors b* b4 and b5 b5 are coiled or crookedat any part of their length, thus giv-` which slides a bar of wood or other non-conducting material, c'.

bbG are metal tubes, running longitudinally through c without disturbing the surface of c. bG b6 are also currentrconductors.

b7 b7 are metal rods or bars secured to but insulated from tube f, and passing into tubes b6 b, bars 117 being slightly sprung apart before being inserted in tubes b. The tubes and bars will remain in constant rubbing and electrical contact. Inner tube, f, can be slipped over bar c, as shown in Fig. 3; or the tubes b6 may be placed within tube j", but electrically separated therefrom and from each other,

when an insulating material that will harden is poured in, thus fixing the tubes and insulating them 4from each other.

f2 shows a packing-box attached to the lower end ofthe tube f, which I employ in vertical extension-fixtures to overcome the weight of the lower bar or tube, lamp, &c. This box may be filled with any suitable packing material to produce sufficient friet-ionlto sustain said weight. B"s a ,switch-box or lamp-holder, preferably of non-conducting material, and is surrounded by a band, to which is secured a plug or sleeve for connecting with a bracket or a pipe or rod. l

g is a thumb-key secured' to plug g.

g2 is a projecting piece or finger-lever secured to g. A l

g3 is a metal strip or spring, and bearing against g2. Two strips can be used-one above andone below the lever.

g5 isa pin or equivalent, against which the lever bears when the circuit is closed. The shape of strip g3 is formed to keep the lever in contact with g5 or out of contact, as desired. A3 is a screw-socket for connecting a vertical eXtension-fiXture with a gas-pipe, which can be replaced by any desired form of fastening.

f2 is a packing-box for producing sufficient friction on tube or bar j" to sustain the weight of the suspendediixture, lamp, 81e. j

f 3 is a socket, open through for convenience of connecting conductors either by hook,leye, or twist. The open end is closed by plug b. Pipes b8 areseeured to j and carry lamp,

shade, 83e., also convey the conductors to the switch and lamp. y

Having thus described myinvention,l I claim as new and desire to secure by Letters Patentl. In electrical extension-fixtures, the com,- bination of the swiveling device consisting of the parts A A, arranged to rotate, and secured together as shown, with the tube f, carrying conductors bl, and bar c, of insulating material,having tubes b, extending longitudinally therethrough, and sliding in said tube f, all substantially as described.

2. In electrical extension-fixtures, the combination ofthe swiveling device consisting of the parts A A, cach having cap c', with tube b2, pin b, passing through said tube and insulated therefrom, and electric conductors connected with said tube and pin, substantially as shown and described.

3. The combination of the swiveling device. y

tube f, carrying conductors bl, and bar c, hav ing tubes b, extending therethrough, all as described, with tube b2, pin b, and conductors b5 b, all substantially as shown and set forth. 4. In electrical brackets, the combination, with a joint or swiveling device maintaining electrical communication, of a tube secured thereto inclosing conductors, and an extensionbar of non-conducting material carrying tubes for continuing electrical contact in extensionarms, substantially as described.

5. In electrical extension devices, the combination of two naked bars secured as shown,

with a bar or tube containing two metal tubes for receiving said naked bars, substantially as shown and described.

In testimony thatI claim the foregoing as my own I hereunto affix my signature in presence of two witnesses.

J. EDVIN GILES. Witnesses:

YV. F. MARTZ, G. F. KIsNnR.

IOO

IIO 

